22902993 has 28 divisors (see below), whose sum is σ = 34822980. Its totient is φ = 15054336.

The previous prime is 22902991. The next prime is 22903007. The reversal of 22902993 is 39920922.

It can be written as a sum of positive squares in 2 ways, for example, as 6718464 + 16184529 = 2592^2 + 4023^2 .

It is not a de Polignac number, because 22902993 - 2¹ = 22902991 is a prime.

It is a super-3 number, since 3×22902993³ (a number of 23 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22902991) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 64705 + ... + 65057.

Almost surely, 2^22902993 is an apocalyptic number.

It is an amenable number.

22902993 is a deficient number, since it is larger than the sum of its proper divisors (11919987).

22902993 is an frugal number, since it uses more digits than its factorization.

22902993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460 (or 445 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 22902993 is about 4785.7071577772. The cubic root of 22902993 is about 283.9863157131.

The spelling of 22902993 in words is "twenty-two million, nine hundred two thousand, nine hundred ninety-three".